PLATE 34. 



Fig. 10. Gyrocotyle fimbriata, ventral. Flattened, stained in borax- 

 carmine, cleared in cedar-oil. Showing arrangement of spines at pos- 

 terior extremity. Spines at anterior extremity not shown. X 4. 



Fig. 11. G. urna, dorsal. Stained flattened specimen. Showing size 

 and character of folds of posterior rosette, and collar of spines about the 

 neck of the rosette. X 4. 



Fig. 12. G. fimbriata, dorsal. Stained flattened specimen. X 4. 



Fig. 13. G. urna (var.), ventral. Showing distribution of spines over 

 whole surface. X 7. 



Figs. 14, 15. G. fimbriata. Showing canal-opening, with proboscis 

 inverted, fig. 14, and everted, fig. 15. Sketch without camera. 



Fig. 16. Sagittal section of longitudinal nerve-stem, showing sheath- 

 cells, branch-nerves, and ganglion-cells of the first order. Iron haem- 

 atoxylin-erythrosin. X 100. 



acet. acetabulum. 



can. op. canal opening. 



gang. 1st. ganglion cell of the first order. 



gen. notch genital notch. 



n. b. nerve branch. 



n. fib. nerve fibre. 



p. op. penis opening. 



par. parenchyma. 



post. ros. posterior rosette. 



prob . proboscis. 



rec. sem. receptaculum seminis. 



sh. c. sheath cell. 



ut. uterus. 



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